springboot-测试类无法注入dao层解决方案

1.报错信息

Error creating bean with name 'studentController': Unsatisfied dependency expressed through field 'studentMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.lei.dao.StudentMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

2.dao层代码

@Mapper
public interface DepartDao extends BaseMapper {

}

3.测试代码

@RunWith(SpringRunner.class)
@SpringBootTest()
class DepartDaoTest {
    @Autowired
    DepartDao departDao;



    @Test
    public void testSelect() {
        System.out.println("111");
    }

}

4.springboot启动类(解决办法:@MapperScan(basePackages = {"xxx.xxx.xxx"}))

@SpringBootApplication
@MapperScan(basePackages = {"xxx.xxx.xxx"})
public class Class4MybatisApplication {

    public static void main(String[] args) {
        SpringApplication.run(Class4MybatisApplication.class, args);
    }

}